Yarn bulking jet

ABSTRACT

A yarn bulking jet comprising a flat body and a door clamped together by fastener means, a longitudinal yarn passageway recessed in the surface of the body contiguous with the door, conduit means intersecting said yarn passageway at a shallow angle for injecting a fluid under pressure into said yarn passageway, said door having a slot recessed in the surface thereof contiguous to said body, said slot being parallel to and adjoining said yarn passageway, and a movable or removable insert conforming essentially to the dimensions of said slot and adapted to be inserted thereinto to substantially fill said slot, the jet being capable of aspirating at normal fluid pressure when said slot is open.

' United States Patent [191' Parks [451 Apr. 9, 1974 YARN BULKING JET William N. Parks, Durham, NC.

[73] Assignee: Hercules Incorporated,Wilmington,

Del.

22 Filed: Sept. 5, 1972 21 Appl. No.: 286,510

[75] Inventor:

s21 U.S. Cl. 28/l.4 [51] Int. Cl. D02g 1/16, D02j 1/08 [58] Field of Search 28/14; 57/34 B; 73/377 [56] References Cited UNITED STATES PATENTS 2,938,257 5/1960 2,995,801 8/1961 3,169,296 2/1965 3,296,679 1/1967 3,525,134 8/1970 3,638,291 2/1972 Primary Examiner-Robert R. Mackey Attorney, Agent, or Firm-James W. Peterson [5 7] ABSTRACT A yarn bulking jet comprising a flat body and a door clamped together by fastener means, a longitudinal yarn passageway recessed in the surface of the body contiguous with the door, conduit means intersecting said yarn passageway at a shallow angle for injecting a fluid under pressure into said yarn passageway, said door having a slot recessed in the surface thereof contiguous to said body, said slot being parallel to and adjoining said yarn passageway, and a movable or removable insert conforming essentially to the dimensions of said slot and adapted to be inserted thereinto to substantially fill said slot, the jet being capable of aspirating at normal fluid pressure when said slot is open. 1

3 Claims, 6 Drawing Figures YARN BULKING .IET

The present invention relates to apparatus for the treatment of synthetic yarn and more particularly to a jet useful for bulking such yarn.

It is well known to employ fluid treatment jets for the bulking of synthetic yarn as exemplified, for instance, by US. Pat. Nos. 3,0l0,270; 2,995,801; 3,457,61 I; and 3,525,134. One of the problems in using bulking jets to treat yarns has been the stringing up of the jet, i.e., the initial feeding of the yarn through the yarn passageway of the jet at the time of start-up. As the yarn passageway must necessarily be quite small, the feeding of the yarn through it is somewhat analogous to the threading of a needle. In addition, most bulking jets do not aspirate unless the pressure of the bulking fluid is reduced below that required for bulking.

The problem of stringing up bulking jets has been solved in different ways according to earlier proposals as shown, for instance, in US. Pat. No. 2,995,801. In most of these earlier proposals, the jet is constructed in two pieces, one of which is provided with a groove serving as a yarn passageway and the other of which serves as a door or cover for the groove. Initially, a running length of yarn is passed through the groove in the jet body and then the groove is closed by installation of the door. This necessitates frequent disassembly of the jet which in turn results in wear and misalignment.

In accordance with the present invention, there is provided a bulking jet which, although constructed in two or more pieces, need not be disassembled in order to string up the yarn and which will aspirate yarn into itself without reducing the pressure of the bulking fluid. Basically, this is'accomplished by providing the door of the jet with a slot which is parallel to and adjoins the yarn passageway in the body of the jet, which slot is filled with an insert after string-up.

In greater detail, the bulking jet of the invention comprises a flat body and a door clamped together by fastener means, a longitudinal yarn passageway recessed in the surface of said body contiguous with said door, conduit means intersecting said yarn passageway at a shallow angles for injecting a fluid under pressure into said yarn passageway, said door having recessed in its surface a slot parallel to and adjoining said yarn passageway, and an insert conforming essentially to the dimensions of said slot and adapted to be inserted thereinto to substantially fill said slot.

The apparatus of the invention is more fully illustrated by reference to the attached drawing in which FIG. 1 is an exploded view in perspective of an entire jet according to one embodiment of the invention which includes a removable insert.

FIG. 2 is a plan view of the jet of FIG. 1 without the removable insert in place, and

FIG. 3 is a sectional view taken along line 3--3 of FIG. 2.

FIG. 4 is an exploded view in perspective of a jet according to another embodiment of the invention, while in the body and door, respectively. The jet body has recessed on the surface thereof contiguous with the door 2 a yarn passageway 3 consisting of a semi-conical entry section 6, a bore 7 of square cross section, a throat 8 having a rectangular cross section larger than the bore 7, and an expansion chamber 9. Shown intersecting the yarn passageway 3, at the beginning of the throat 8 are a pair of fluid conduits 5 which in turnconnect with fluid source passages 4, and are adapted for the injection of a fluid under pressure into yarn passageway 3. The door 2 is provided with a slot 11 recessed in the surface of the door contiguous to the jet body 1 and lying parallel to and adjoining the yarn passageway 3. The slot 11 is slightly tapered, as shown in FIG. 2, and has a width such that the bulking fluid after traveling through a short section of conduits 5 can expand into slot 11 to create an aspirating effect.

Also shown in FIG. 1 is a removable insert 16 consisting of an elongated tapered member 12, a head 13 and a wire handle 14. The tapered member 12 is so shaped and sized as to be insertable into slot 11 and substantially fill the same.

The stringing up of the bulking jet of the invention is exceedingly simple. To perform the operation, the yarn is directed across the top of the jet by appropriate means such as an air aspirating gun. Initially, the jet is made capable of aspirating by removing insert 16 to create slot 11. The bulking fluid is then introduced at normal operating pressure. As slot 11 only partially covers fluid conduits 5, the fluid is directed downwardly thus causing the jet to aspirate. Then as the yarn is running across the top of the jet, it is cut and the loose end formed by cutting is aspirated into the jet. Thereafter, the insert 16 is inserted into the slot 11 and the jet thereby converted into a bulking jet without changing the pressure of the bulking fluid.

There is shown in FIGS. 4, 5 and 6 an embodiment of the invention in which the insert is movable rather than removable. As shown in FIG. 4, the jet of this embodiment comprises a jet body 1 identical to the jet embodiment of FIG. 1 and a door 17 which arm secured together by means of nuts and bolts 15 and 15A through mated holes 10 and 103 in the body and door, respectively. The door 17 in this embodiment is provided with grooves 18 and 19 and in its bottom and top surfaces, respectively, and a slot 20 in the face of the door abutting the jet body 1, with said slot 20 parallel ing and adjoining the yarn passageway 3. Also, the door 17 is provided with a threaded hole 21 into which is threaded a set screw 22 which has a handle 23 and a head 24. Also shown is an insert. 25 consisting of vertical section 26 which is provided with recess 27, into which the head 24 of set screw 22 is engaged, and horizontal arms 28 and 28A which mate into grooves 18 and 19, respectively. As is readily obvious from the drawings, turning of the set screw 22 causes back and forth movement of insert 25. Consequently, when the set screw 22 is in its fully retracted position, insert 25 is withdrawn into slot 20 leaving open the portion of the slot adjacent yarn passageway 3. Conversely, when set screw 22 is rotated into its forwardmost position, insert 25 is caused to move forward into a position abutting the yarn passageway 3.

The operation of the jet shown embodied in FIGS. 4, 5 and 6 is analogous to that of the jet embodied in FIGS. 1, 2 and 3. That is, when stringing up the yarn, the movable insert 25 is retracted. While the yarn is running across the top of the jet, the yarn is cut and its free end aspirated into the jet. Thereafter, insert 25 is moved forward into engagement with the body leaving only the yarn passageway as the opening through which the yarn travels.

It is obvious that many modifications can be made in the bulking jet without departing from the spirit and scope of the invention which, in essence, is directed broadly to the concept of providing a slot in the jet adjacent the yarn passageway, thus in effect enlarging the passageway for the purpose of creating an aspirating-jet to assist stringing up, and then blocking or filling the slot with a movable or removable insert. The invention is not intended to be limited to a slot of any particular shape or to a yarn passageway of any particular configuration as these details are well within the scope of one skilled in the art.

What i claim and desire to protect by Letters Patent l. A yarn bulking jet comprising a flat body and a door clamped together by fastener means, a longitudinal yarn passageway recessed in the surface of the body contiguous with the door, conduit means intersecting said yarn passageway at a shallow angle for injecting a fluid under pressure into said yarn passageway, said door having a slot recessed in the surface thereof contiguous to said body, said slot being parallel to and adjoining said yarn passageway, and a movable insert conforming essentially to the dimensions of said slot moveable to substantially fill said slot, the jet being capable of aspirating at normal fluid pressure when said slot is open.

2. The yarn bulking jet of claim 1 in which said insert is removable.

3. The yarn bulking jet of claim 1 in which said insert is slidably mounted within said slot and further includ ing adjusting means connected to said insert through said door to move said insert from a retracted position within said slot when yarn is aspirated to an extended position to fill said slot when yarn is bulked. 

1. A yarn bulking jet comprising a flat body and a door clamped together by fastener means, a longitudinal yarn passageway recessed in the surface of the body contiguous with the door, conduit means intersecting said yarn passageway at a shallow angle for injecting a fluid under pressure into said yarn passageway, said door having a slot recessed in the surface thereof contiguous to said body, said slot being parallel to and adjoining said yarn passageway, and a movable insert conforming essentially to the dimensions of said slot moveable to substantially fill said slot, the jet being capable of aspirating at normal fluid pressure when said slot is open.
 2. The yarn bulking jet of claim 1 in which said insert is removable.
 3. The yarn bulking jet of claim 1 in which said insert is slidably mounted within said slot and further including adjusting means connected to said insert through said door to move said insert from a retracted position within said slot when yarn is aspirated to an extended position to fill said slot when yarn is bulked. 